GPS week roll over 2019 - xNAV

1. Introduction

This process applies to the xNAV550  and xNAV250 only.

There are two stages to this upgrade, one for the xNAV firmware and one for the GPS card firmware. This process should take up to 40 minutes.

The update process can only be updated using Ethernet. You will have received the following files:

• .to1
• .to2
• xbns

NOTE: If the software has been sent in a zip file, the extension might have been changed to .piz so that it is not rejected by email security systems. If so, change it to .zip, then unzip the file.

2. Connect Ethernet

The RJ45 Ethernet connector on xNAV can be plugged in to a network hub. To connect it directly to a laptop a crossover must be used. The xNAV is supplied with a suitable cable for connection to a laptop computer. The IP address of the laptop must be in the same subnet as the xNAV, in other words the IP address should begin 195.0.0. (by default) and end with a number lower than 255 that is different from the xNAV.

3. Viewing Raw Data on xNAV

Use Windows Explorer to connect to the xNAV.

In the address box ftp to the IP address of the xNAV, for example ftp://195.0.0.m where m is the last two digits of the serial number, as shown in the screenshot below. Please note, if you have changed the IP address of your unit, you should use the address you set instead.

Explorer will list all the raw data files that are stored in the xNAV. If you are able to view this then skip to step 4.

If Internet Explorer automatically opens when you try to connect over FTP, open the Internet Options, Advanced tab and tick the setting to enable FTP folder view outside of Internet Explorer (see below).

4. Back up old files

Before updating the firmware, back-up any RD files you may need.

Do not delete the files that start with mobile. These are your configuration files and should only be changed using the NAVconfig. (The file mobile.rd can be deleted, but the system will put it back).

5. Applying the firmware

You should first check that you have no commands in the advance commands section of the configuration relating to the serial port as seen in the screen shot below.

 The files must be unzipped before they are applied to the unit. The firmware must be transferred as binary data, with the file name unchanged. 

• First apply xbns, drag-and-drop it in the Explorer window of the unit.
• Wait 10 seconds, turn off the xNAV and turn it back on again

6. Check firmware version

Run NAVdisplay and connect to the xNAV as normal. In NAVconnect the firmware id is displayed, as shown below.

This should be 190324x1. The name of the zipped file containing the firmware will tell you the version of the rtbns firmware. Once this is applied you may not be able to see or use satellites until you update the GPS card firmware.

8. Applying the GPS card firmware (primary)

The files must be unzipped before they are applied to the unit. The firmware must be transferred as binary data, with the file name unchanged. Do not connect GPS antennas during this process.

• To copy the .to1 file drag-and-drop it in the Explorer window of the unit. 
• Wait 10 seconds, turn off the xNAV and turn it back on again
• Check firmware has been taken

Uploading this firmware may take up to 20 minutes. During this time the unit may not be visible in NAVdisplay and if it is it will show no satellites being tracked. When the update is complete the unit should start tracking satellites again. After this, check the FTP for the unit and make sure the .to1 file has disappeared. If the file is still there power cycle to try the process again.

Now you can connect the antennas, run NAVdisplay and connect to the xNAV as normal. You should be able to see satellites and be in a position mode.

If both the files have ben taken then the process should now be complete. You will need to download the new NAVsuite 2.5 or later to be able to post process the data from the unit after the date 6^th April 2019. This can be downloaded from our support website nearer to the date:

https://support.oxts.com/hc/en-us/articles/360000158105-NAVsuite-Download

If you are still experiencing problems, contact support support@oxts.com +44(0)1869 814 251